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Effects of Gonadotropin Releasing Hormone Analogue in Enhancements of Pregnancy in Repeat Breeding Dairy Cows in and around Mekelle, Tigray, Ethiopia

Received: 29 December 2014     Accepted: 12 January 2015     Published: 27 January 2015
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Abstract

Clinical trial was carried out to evaluating the effects of GNRH analogue (buserelin acetate) along with AI in repeat breeding cross breed cows on enhancement of pregnancy. The trial was also aimed at evaluation of dose variation on conception rate. Sixty six cross breed dairy cattle which were apparently healthy, exhibits estrus regularly were selected and assigned randomly in to three equal groups(A,B and C); two treated groups and one control group. Group A (n=22) cattle were injected intramuscularly a 20 µg buserelin acetateat along with AI and Group B (n=22) cattle have injected with dose of 10µg Buserelin acetate. Group C (n=22) cattle were receive no treatment and considered as a control group, given a single service. These cows were examined for pregnancy after three months through rectal palpation. Additional history was taken from herd owners. The pregnancy rates recorded were 68%, 59% and 32% in the cattle grouped with A, B and C respectively. The conception rates of the treated groups exceeds control group by 36% and 27% respectively. Treated groups showed a significant statistical variation (P<0.05) as compared to control group. Dose variation between two treated groups has an effect on pregnancy rate with significant variation. Other observed finding was that treated first and second parity cows became more responsive to therapy than those with more than two parity with a significant variation (P<0.05). The study revealed that the use of GNRH analogue therapy at the time of AI can enhance pregnancy rate. This would be helpful and cost effective to minimize financial losses incurred from milk production loss, managmental and feed cost. This might be achieved through reducing calving interval and treating repeat breeding cases. The benefit cost ratio indicates that individual cow could benefit small holder farmer by 140 USD within a single month.

Published in Animal and Veterinary Sciences (Volume 3, Issue 1)
DOI 10.11648/j.avs.20150301.13
Page(s) 12-17
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2015. Published by Science Publishing Group

Keywords

Crossbred Cattle, Estrus, Repeat Breeding GNRH Analogue, Pregnancy Rates

References
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    Birhanu Hailu, Berihu Gebrekidan, Solmon Raju, Alemselam Birhanu, Gebrhiwot Tadesse. (2015). Effects of Gonadotropin Releasing Hormone Analogue in Enhancements of Pregnancy in Repeat Breeding Dairy Cows in and around Mekelle, Tigray, Ethiopia. Animal and Veterinary Sciences, 3(1), 12-17. https://doi.org/10.11648/j.avs.20150301.13

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    ACS Style

    Birhanu Hailu; Berihu Gebrekidan; Solmon Raju; Alemselam Birhanu; Gebrhiwot Tadesse. Effects of Gonadotropin Releasing Hormone Analogue in Enhancements of Pregnancy in Repeat Breeding Dairy Cows in and around Mekelle, Tigray, Ethiopia. Anim. Vet. Sci. 2015, 3(1), 12-17. doi: 10.11648/j.avs.20150301.13

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    AMA Style

    Birhanu Hailu, Berihu Gebrekidan, Solmon Raju, Alemselam Birhanu, Gebrhiwot Tadesse. Effects of Gonadotropin Releasing Hormone Analogue in Enhancements of Pregnancy in Repeat Breeding Dairy Cows in and around Mekelle, Tigray, Ethiopia. Anim Vet Sci. 2015;3(1):12-17. doi: 10.11648/j.avs.20150301.13

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  • @article{10.11648/j.avs.20150301.13,
      author = {Birhanu Hailu and Berihu Gebrekidan and Solmon Raju and Alemselam Birhanu and Gebrhiwot Tadesse},
      title = {Effects of Gonadotropin Releasing Hormone Analogue in Enhancements of Pregnancy in Repeat Breeding Dairy Cows in and around Mekelle, Tigray, Ethiopia},
      journal = {Animal and Veterinary Sciences},
      volume = {3},
      number = {1},
      pages = {12-17},
      doi = {10.11648/j.avs.20150301.13},
      url = {https://doi.org/10.11648/j.avs.20150301.13},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.avs.20150301.13},
      abstract = {Clinical trial was carried out to evaluating the effects of GNRH analogue (buserelin acetate) along with AI in repeat breeding cross breed cows on enhancement of pregnancy. The trial was also aimed at evaluation of dose variation on conception rate. Sixty six cross breed dairy cattle which were apparently healthy, exhibits estrus regularly were selected and assigned randomly in to three equal groups(A,B and C); two treated groups and one control group. Group A (n=22) cattle were injected intramuscularly a 20 µg buserelin acetateat along with AI and Group B (n=22) cattle have injected with dose of 10µg Buserelin acetate. Group C (n=22) cattle were receive no treatment and considered as a control group, given a single service. These cows were examined for pregnancy after three months through rectal palpation. Additional history was taken from herd owners. The pregnancy rates recorded were 68%, 59% and 32% in the cattle grouped with A, B and C respectively. The conception rates of the treated groups exceeds control group by 36% and 27% respectively. Treated groups showed a significant statistical variation (P<0.05) as compared to control group. Dose variation between two treated groups has an effect on pregnancy rate with significant variation. Other observed finding was that treated first and second parity cows became more responsive to therapy than those with more than two parity with a significant variation (P<0.05). The study revealed that the use of GNRH analogue therapy at the time of AI can enhance pregnancy rate. This would be helpful and cost effective to minimize financial losses incurred from milk production loss, managmental and feed cost. This might be achieved through reducing calving interval and treating repeat breeding cases. The benefit cost ratio indicates that individual cow could benefit small holder farmer by 140 USD within a single month.},
     year = {2015}
    }
    

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    T1  - Effects of Gonadotropin Releasing Hormone Analogue in Enhancements of Pregnancy in Repeat Breeding Dairy Cows in and around Mekelle, Tigray, Ethiopia
    AU  - Birhanu Hailu
    AU  - Berihu Gebrekidan
    AU  - Solmon Raju
    AU  - Alemselam Birhanu
    AU  - Gebrhiwot Tadesse
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    DO  - 10.11648/j.avs.20150301.13
    T2  - Animal and Veterinary Sciences
    JF  - Animal and Veterinary Sciences
    JO  - Animal and Veterinary Sciences
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    EP  - 17
    PB  - Science Publishing Group
    SN  - 2328-5850
    UR  - https://doi.org/10.11648/j.avs.20150301.13
    AB  - Clinical trial was carried out to evaluating the effects of GNRH analogue (buserelin acetate) along with AI in repeat breeding cross breed cows on enhancement of pregnancy. The trial was also aimed at evaluation of dose variation on conception rate. Sixty six cross breed dairy cattle which were apparently healthy, exhibits estrus regularly were selected and assigned randomly in to three equal groups(A,B and C); two treated groups and one control group. Group A (n=22) cattle were injected intramuscularly a 20 µg buserelin acetateat along with AI and Group B (n=22) cattle have injected with dose of 10µg Buserelin acetate. Group C (n=22) cattle were receive no treatment and considered as a control group, given a single service. These cows were examined for pregnancy after three months through rectal palpation. Additional history was taken from herd owners. The pregnancy rates recorded were 68%, 59% and 32% in the cattle grouped with A, B and C respectively. The conception rates of the treated groups exceeds control group by 36% and 27% respectively. Treated groups showed a significant statistical variation (P<0.05) as compared to control group. Dose variation between two treated groups has an effect on pregnancy rate with significant variation. Other observed finding was that treated first and second parity cows became more responsive to therapy than those with more than two parity with a significant variation (P<0.05). The study revealed that the use of GNRH analogue therapy at the time of AI can enhance pregnancy rate. This would be helpful and cost effective to minimize financial losses incurred from milk production loss, managmental and feed cost. This might be achieved through reducing calving interval and treating repeat breeding cases. The benefit cost ratio indicates that individual cow could benefit small holder farmer by 140 USD within a single month.
    VL  - 3
    IS  - 1
    ER  - 

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Author Information
  • Samara University, College of Veterinary Medicine, P.O.Box.132, Samara, Ethiopia

  • Mekelle University, College of Veterinary Medicine, Mekelle, Ethiopia

  • Mekelle University, College of Veterinary Medicine, Mekelle, Ethiopia

  • Mekelle University, College of Veterinary Medicine, Mekelle, Ethiopia

  • Mekelle University, College of Veterinary Medicine, Mekelle, Ethiopia

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